Tellurian



UNITED STATES PATENT OFFICE.

JOHN A. BOVVYER, OF LA FORTE, INDIANA.

TELLURIAN.

SPECIFICATION forming part of Letters Patent No. 239,644, dated April 5,1881.

Application filed January 10, 1881. (No model.) b c To all whom it mayconcern:

Be it known that I, JOHN A. BOWYER, of La Porte, in the county of LaPorte and State of Indiana, have invented certain new and usefulImprovements in Tellurians, of which the following is a specification.

My invention relates to improvements in apparatus for illustratingvarious celestial and terrestrial phenomena; and the same consists inthe novel construction, combination, and arrangement of the deviceshereinafter described.

ln the accompanying drawings, which form apart ofthis specification, andin which similar letters of reference indicate like parts, Figure 1 is aside elevation of a device embodying my invention. of the jointformounting the earth-globe, and Fig. 3 is a like section of the joint forthe moon-globe.

In said drawings, A represents the base piece or pedestal, upon whichthe whole mechanism is mounted as a pivot.

B is the arm upon which the earth-globe b is mounted. The inner end ofthis arm B is provided with a socket, a, which fits on the pivot of thepedestal, so that the arm may turn or revolve upon the same.

The direction of the sun is indicated by the needle 0, representing aray of light therefrom, which is secured to the uprightshaft G,mountedin the socket a, so that the needle will revolve with the arm carryingthe earth-globe, and consequently always point directly toward theearth-globe as the latter is revolved. This needle is adjustable on theshaft 0,:so that it may be fixed in theplane of the ecliptic or otherpositions, as desired.

. The axis D of the earth-globe is secured to the curved inclination-arm(I, so as to indicate the inclination of the earths equator to theecliptic. The curved arm d is fixed rigidly to, but in such manner as tobe readily removed from, the spindle cl,which works in the hollow sleeved which sleeve is secured to the end of the arm B.

d is a band passing around the pulley d fixed rigidly to the pedestal,and the pulley 01 secured rigidly on the spindle d4, so that at eachrevolution of the earth-globe around the sun the spindle d is caused tomake one revolution on its own axis, thus causing the axis Fig. 2 is acentral vertical section" of the eartltglobe always topoint in the samedirection, and illustrating the seasons and the changed position of theday-and-night circle on theearths surface, and other phenomena due tothe inclination of the earths axis.

E is a semicircle representing the ecliptic. It is supported on thecurved arm E, which is securedbymeans of the clampingscrew E to theslotted bracket E so as to be adjustable thereon. The bracket E isattached rigidly 'to the sleeve d so that the day-and-night circle F,which is secured to the ecliptic-circle E, will always remain at rightangles to the direction of the sun as the earth-globe is revolved aroundthe same.

G is the moon-globe, the light face of which is turned toward the sun.It is supported on an arm, 9, mounted on and revolving about the sleeved. The moon-globeis mounted adjustahly on the shaft 9, which fits in asuitable hole or socket, 9 in the upper end of the spindle 9 which worksin the hollow sleeve on the end of the arm 9.

g is a band passing around the pulley g rigidly secured to the sleeve6?, and the pulley 9 secured to the spindle 9 so that by means of saidband and pulleys the moon-globe, as it is revolved about theearth-globe, is made to keep its light face always turned toward thesun, and thus exhibit the different phases of equator and the ecliptic,and the effect of its changed position on the tides and other phenomena,may be illustrated.

H is a pointer or indicator attached to the arm B, for the purpose ofindicating the earths position in the heavens during the differentseasons of the year, as the earth-globe is made to revolve about the sunupon the graduated base-piece or pedestal, which is graduated to showthe signs of the zodiac, the months of the year, the points of thecompass, the equation of time, and other things, if desired.

Kis a compass mounted on an extension of the arm g, for the purpose ofindicating the direction of the North pole in the use of the apparatus.

The different parts of the apparatus are made removable, so that theymay be readily detached from each other and reduced to a compact formfor convenience in transportation and storage.

What 1 claim is- 1. In a tellurian, the combination of pedestal A withrevolving earth-arm B, hollow sleeve 01 secured to the outer end of saidarm, spindle cl, band (1 pulleys d and d moonarm g, mounted on sleeve dand provided with hollow sleeve 9 secured to its outer end, spindle gband g and pulleys and all arranged and combined substantially as andfor the purpose specified.

2. The combination of arm B, sleeve d spindle d, bracket E secured tosaid sleeve for supporting the ecliptic-circle, moon-arm g, sleeve 9,spindle g band 9 and pulleys g and 9 all arranged, combined, andoperating substantially as specified.

3. The combination of the pedestal provided with graduated base, arm B,provided with indicator H, moon and earth globes and sunneedle, mountedand arranged substantially as shown, sleeve d spindle d, band at,pulleys d and d moon-arm g, sleeve 9 spindle g band 1 pulleys g and gbracket E curved arm E, ecliptic-circle E, and compass K, secured to anextension of the arm g, all combined and operating substantially asdescribed.

JOHN A. BOWYER.

Witnesses EVERETT BROWN, EDMUND ADoooK.

